Place this on stack with algebriac mode: [2 * x - 3 * y + z = 5, x + y - 2 * z = 0, -x + 2 * y + 3 * z = -3] run command 'a S x,y,z' Receive error 'Division by zero: 1' I enabled Debug on Error but could not find the backtrace Emacs  : GNU Emacs 25.1.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.11)  of 2017-09-14, modified by Debian Package: Calc --  Christopher Howard p: +1 (907) 374-0257 w: https://librehacker.com xmpp: creationist@member.fsf.org otr: E9685B53 01F038DD D29281C9 30FDA71E BD0095D4 gnupg: 23FD5CC5 (keys.gnupg.net) radio: KL1TL featured: https://emailselfdefense.fsf.org/en/ id="-x-evo-selection- start-marker">